The TreeAligner is a tool for work with parallel treebanks. The current version (1.2.3) runs on Windows, Linux and Mac OS X (only with MacPorts). This version supports:

• Browsing treebanks
• Creating new alignments
• Searching single and parallel treebanks

A parallel treebank consists of two corpora encoded with the TIGER XML Format, a file with word- and phrase-alignments.

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For searching mono- and multilingual treebanks, the TreeAligner contains an implementation of the TIGER query language for annotated corpora. Additionally to the original features, it supports the following extensions:

• restricted universal quantification
• searching in treebanks annotated with frame semantics